Asked by anonymous

A car traveling 90km/h is 100m behind a truck traveling 75km/h. How
long will it take the car to reach the truck?

which one of newtons 4 equations should be used in order to solve this equation?
V=Vo + at
X=Xo + Vot + 1/2 at2
V2= Vo2 + 2a(X-Xo)
_
V=V+vo/2


any help i can get is good...thankyou :)

Answered by DrBob222
Think about this.
distance = rate x time.
Truck: d = 75t. Solve for t = d/75
Car: started behind by 100 m which is 0.1 km so d+0.1 = 100t. Solve for t = (d+0.1)/100.

Now we know that the time for the car and the time for the truck are equal so set the times = to each other.
d/75 = (d+0.1)/100
Solve for d and d+0.1 and plug those back into the original equations above to find time. Post your work if you get stuck. Check my thinking.
Answered by anonymous
Well to be perfectly honest, i just started taking physics so im only up to the level where to me d=d and not rate x time....i am totally lost at what u did, but its ok, thanks for your help anyway, i think i understand a bit more now.
Answered by mahesh
what happend 2 ur mobile? i was trying 2 call u but i got this msg: welcome 2 D jungle network,D monkey u r tring 2 call is on tree plz try later.
There are no AI answers yet. The ability to request AI answers is coming soon!